Steam generation system, method and reactor system

Abstract

The invention relates to a steam generation system and method and a reactor system. The system is characterized in that an active water supply tank is connected with a steam generator through a main water supply pump, and a passive water supply tank is connected with the steam generator; by the adoption of the system, on one hand, the controller controls the main water feeding pump to work under the condition that the main water feeding pump is normal so that the active water feeding tank can supply water to the steam generator, and when the main water feeding pump supplies water to the steam generator, a water feeding path of the active water feeding tank comprises the passive water feeding tank; the temperature of water in the passive water supply tank, the temperature of water in the active water supply tank and the water supply temperature of the steam generator are kept unchanged, so that the condition of temperature impact is avoided, and the stability of the system is improved. And on the other hand, the controller also controls the passive feed water tank to supply water to the steam generator under the condition that the main feed water pump is abnormal, so that water can be normally supplied to the steam generator even under the condition that the main feed water pump is shut down, the overtemperature of the reactor is avoided, and the system stability is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of nuclear power plant system equipment design, and in particular to a steam generation system, method and reactor system. Background Art

[0002] In the daily operation of nuclear power plants, the reactor generates a lot of heat. The reactor transfers the heat to the secondary circuit through the steam generation system to prevent the reactor from overheating. The heat transfer efficiency depends largely on the stability of the water supply system used to supply water in the steam generation system.

[0003] In the traditional way, the water supply system consists of a water tank and a water supply pump. The water supply pump draws water from the water tank and delivers it to the steam generator. When the entire plant loses AC power, the water supply pump stops operating and the stability of the steam generation system is still low. Summary of the invention

[0004] Based on this, it is necessary to provide a steam generation system, method, reactor system, device, computer equipment, computer-readable storage medium and computer program product that can improve system stability in response to the above technical problems.

[0005] In the first aspect, the present application provides a steam generating system including: an active water supply tank, a main water supply pump, a passive water supply tank, a steam generator and a controller; the active water supply tank is connected to the steam generator through the main water supply pump; the passive water supply tank is connected to the steam generator; when the main water supply pump is normal, the controller controls the main water supply pump to operate so that the active water supply tank supplies water to the steam generator; the water supply path of the active water supply tank includes the passive water supply tank; the controller also controls the passive water supply tank to supply water to the steam generator when the main water supply pump is abnormal.

[0006] In one of the embodiments, the system further includes: a water injection pipe isolation valve disposed between the passive feedwater tank and the steam generator; and a main feedwater isolation valve disposed between the main feedwater pump and the steam generator.

[0007] In one of the embodiments, the system also includes: a high-pressure gas tank connected to the passive water supply tank, the air pressure in the passive water supply tank and the air pressure in the high-pressure gas tank maintaining a pressure balance; a gas compressor arranged on the high-pressure gas tank; when the main water supply pump is normal, the controller obtains the liquid level height of the passive water supply tank, and based on the numerical difference between the liquid level height and the preset height, controls the operation of the gas compressor so that the numerical difference is less than the difference threshold.

[0008] In one of the embodiments, the system also includes: a liquid level measuring probe arranged in the passive water tank; the liquid level measuring probe is used to detect the liquid level height of the passive water tank; the controller also controls the valve opening of the water injection pipe isolation valve when the main water supply pump is abnormal and the liquid level height is less than the height threshold, so that the passive water supply tank stops supplying water to the steam generator.

[0009] In one of the embodiments, the system also includes: a make-up water check valve arranged between the main feed water pump and the passive feed water tank; a main feed water check valve arranged between the main feed water pump and the steam generator; the controller is also used to control the make-up water check valve and the main feed water check valve to be in an open state when the main feed water pump is normal, and to control the make-up water check valve and the main feed water check valve to be in a closed state when the main feed water pump is abnormal.

[0010] In one embodiment, the steam generator includes a steam manifold and a feed water manifold; the system also includes a condensing heat exchanger connected to the steam manifold and the feed water manifold respectively; when the main feed water pump is abnormal, the controller controls the condensing heat exchanger to operate so that the condensing heat exchanger supplies water to the feed water manifold, and the condensing heat exchanger receives the generated steam from the steam manifold.

[0011] In one embodiment, the system also includes: a steam pipe isolation valve arranged between the steam manifold and the condensing heat exchanger; a return pipe isolation valve arranged between the condensing heat exchanger and the feed water manifold; the controller is also used to control the water supply to the condensing heat exchanger by adjusting the valve opening of the steam pipe isolation valve, and to control the amount of steam received by the condensing heat exchanger by adjusting the valve opening of the return pipe isolation valve.

[0012] In one of the embodiments, the system also includes: a main steam isolation valve connected to the steam manifold; the main steam isolation valve and the steam pipe isolation valve are in different steam circuits; when the main feed water pump is normal, the controller controls the valve opening of the main steam isolation valve so that the steam in the steam manifold is transported to the turbine through the main steam isolation valve to drive the turbine to generate electricity; when the main feed water pump is abnormal, the controller controls the valve opening of the main steam isolation valve so that the steam in the steam manifold is transported to the condensing heat exchanger through the steam pipe isolation valve.

[0013] In a second aspect, the present application provides a steam generation method, which is applied to any controller as described above, and the method includes: when the main feed water pump is normal, controlling the main feed water pump to operate so that the active feed water tank supplies water to the steam generator; the water supply path of the active feed water tank includes a passive feed water tank; when the main feed water pump is abnormal, controlling the passive feed water tank to supply water to the steam generator.

[0014] In a third aspect, the present application provides a reactor system, comprising the steam generating system as described above, and a reactor for heating the steam generator.

[0015] In a fourth aspect, the present application also provides a steam generating device. The device comprises: a normal water supply module, which is used to control the main water supply pump to work when the main water supply pump is normal, so that the active water supply tank supplies water to the steam generator; the water supply path of the active water supply tank includes a passive water supply tank; and an abnormal water supply module, which is used to control the passive water supply tank to supply water to the steam generator when the main water supply pump is abnormal.

[0016] When the main feed water pump is normal, the main feed water pump is controlled to operate so that the active feed water tank supplies water to the steam generator; the water supply path of the active feed water tank includes the passive feed water tank; when the main feed water pump is abnormal, the passive feed water tank is controlled to supply water to the steam generator.

[0017] In a fifth aspect, the present application further provides a computer device. The computer device includes a memory and a processor, the memory stores a computer program, and the processor implements the following steps when executing the computer program:

[0018] When the main feed water pump is normal, the main feed water pump is controlled to operate so that the active feed water tank supplies water to the steam generator; the water supply path of the active feed water tank includes the passive feed water tank; when the main feed water pump is abnormal, the passive feed water tank is controlled to supply water to the steam generator.

[0019] In a sixth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0020] When the main feed water pump is normal, the main feed water pump is controlled to operate so that the active feed water tank supplies water to the steam generator; the water supply path of the active feed water tank includes the passive feed water tank; when the main feed water pump is abnormal, the passive feed water tank is controlled to supply water to the steam generator.

[0021] In a seventh aspect, the present application further provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the following steps are implemented:

[0022] When the main feed water pump is normal, the main feed water pump is controlled to operate so that the active feed water tank supplies water to the steam generator; the water supply path of the active feed water tank includes the passive feed water tank; when the main feed water pump is abnormal, the passive feed water tank is controlled to supply water to the steam generator.

[0023] The steam generation system, method and reactor system, the steam generation system includes an active feedwater tank, a main feedwater pump, a passive feedwater tank, a steam generator and a controller, the active feedwater tank is connected to the steam generator through the main feedwater pump, and the passive feedwater tank is connected to the steam generator; using the above system, on the one hand, the controller controls the main feedwater pump to work when the main feedwater pump is normal, so that the active feedwater tank supplies water to the steam generator; the water supply path of the active feedwater tank includes the passive feedwater tank, and when the main feedwater pump supplies water to the steam generator, the water supply path of the active feedwater tank includes the passive feedwater tank, so that the water in the passive feedwater tank, the water in the active feedwater tank, and the water supply temperature of the steam generator remain unchanged, thereby avoiding temperature shock and improving system stability. On the other hand, the controller also controls the passive feedwater tank to supply water to the steam generator when the main feedwater pump is abnormal, so that the steam generator can still be supplied with water normally even when the main feedwater pump is shut down, avoiding reactor overheating, thereby improving system stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of a steam generating system in one embodiment;

[0025] Figure 2 A schematic diagram of a partial structure of a steam generating system in one embodiment;

[0026] Figure 3 is a schematic diagram of a gas compressor in one embodiment;

[0027] Figure 4 is a schematic diagram of a check valve in one embodiment;

[0028] Figure 5 is a schematic diagram of a condensation heat exchange circuit in one embodiment;

[0029] Figure 6 is a schematic diagram of a condensation heat exchange system in one embodiment;

[0030] Figure 7 is a schematic flow diagram of a steam generation method in one embodiment;

[0031] Figure 8 is a schematic structural diagram of an advanced reactor system in one embodiment;

[0032] Fig. 9 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] In one embodiment, Figure 1 As shown, a steam generation system is provided, which includes: an active feedwater tank 110, a main feedwater pump 120, a passive feedwater tank 130, a steam generator 140 and a controller 150.

[0035] The active feedwater tank 110 is connected to the steam generator 140 via the main feedwater pump 120;

[0036] The active water supply tank may be a water tank for storing cooling water. The water source of the active water supply tank may be condensed water generated by condensing turbine waste steam from a power plant condenser.

[0037] The main water supply pump may be a mechanical device for conveying water. Specifically, the main water supply pump drives an impeller to rotate through a motor based on pressure difference and centrifugal force, and uses centrifugal force to pump water from a low place to a high place.

[0038] The main feed water pump is connected to the active feed water tank. The main feed water pump can be used to extract cooling water or condensed water from the active feed water tank and transport the water to the passive feed water tank or steam generator. For example, the main feed water pump can be connected to the bottom of the active feed water tank through a suction line, extract the condensed water inside the water tank, and inject it into the steam generator through the main feed water pipeline after pressurization. Then, water is continuously supplied to the steam generator to achieve heat exchange and avoid overheating of the steam generator.

[0039] A steam generator can be a device that produces steam by heating liquid water. The steam generator uses a heat source to heat water to a boiling point to form steam. The heat exchange characteristics of the steam generator are used in the reactor to remove heat from the reactor. The heat removed by the steam generator can be in the form of steam, which can drive the turbine blades to generate electricity.

[0040] The steam generator may be located downstream of the main feedwater line corresponding to the main feedwater pump.

[0041] The passive feedwater tank 130 is connected to the steam generator 140 .

[0042] The passive water supply tank may be a water tank for storing cooling water. The cold source water in the passive water supply tank comes from the main water supply pump, and the bottom of the passive water supply tank is connected to the main water supply pipeline through a water supply pipeline.

[0043] The passive feedwater tank is connected to the main feedwater pump through a make-up water pipeline. The steam generator is connected to the main feedwater pump through the main feedwater pipeline. The diameter of the make-up water pipeline can be smaller than the diameter of the main feedwater pipeline, ensuring that the water drawn by the main feedwater pump is mainly used to supply water to the steam generator, thereby ensuring the water supply to the steam generator.

[0044] When the main feedwater pump 110 is normal, the controller 150 controls the main feedwater pump 120 to operate so that the active feedwater tank 110 supplies water to the steam generator 140. The water supply path of the active feedwater tank 110 includes the passive feedwater tank 130.

[0045] The controller may be a device with data processing capability, such as a PLC or a computing device.

[0046] The water supply path of the active water supply tank may include a main water supply line and a secondary water supply line.

[0047] The main water supply line may include a main water supply pump, a main water supply pipeline, and a steam generator. The auxiliary water supply line may include a main water supply pump, a water supply line, a passive water supply tank, a water injection line, and a steam generator. Specifically, the auxiliary water supply line may include a main water supply pump, part of the main water supply pipeline, a water supply line, a passive water supply tank, a water injection line, part of the main water supply pipeline, and a steam generator.

[0048] Specifically, when the main feedwater pump is normal, the controller can control the main feedwater pump to supply water to the steam generator along the main feedwater line. The controller can also control the main feedwater pump to supply water to the passive feedwater tank, and the water in the passive feedwater tank flows into the steam generator.

[0049] The controller 150 also controls the passive feedwater tank 130 to supply water to the steam generator 140 when the main feedwater pump 120 is abnormal.

[0050] Among them, the main water supply pump abnormality may mean that the main water supply pump cannot realize the water pumping and delivery function. For example, the main water supply pump abnormality may be any one of the following abnormalities: a circuit failure of the main water supply pump, a power failure of the main water supply pump, and a motor damage in the main water supply pump.

[0051] Specifically, in the event of an abnormality in the main feedwater pump, the controller may control the passive feedwater tank to supply water to the steam generator.

[0052] In one of the embodiments, the controller may control the water injection pipe isolation valve on the water injection pipeline of the passive feedwater tank to open, thereby ensuring that the water in the passive feedwater tank flows to the steam generator.

[0053] In one embodiment, in order to ensure that the water in the passive feedwater tank flows to the steam generator instead of flowing back to the main feedwater pump, a check valve can be provided between the passive feedwater tank and the main feedwater pump. The check valve is in an open state when the main feedwater pump is normal. The check valve is in a closed state when the main feedwater pump is abnormal.

[0054] In the above system, the steam generation system includes an active feedwater tank, a main feedwater pump, a passive feedwater tank, a steam generator and a controller. The active feedwater tank is connected to the steam generator through the main feedwater pump, and the passive feedwater tank is connected to the steam generator. With the above system, on the one hand, when the main feedwater pump is normal, the controller controls the main feedwater pump to work so that the active feedwater tank supplies water to the steam generator. The water supply path of the active feedwater tank includes the passive feedwater tank. When the main feedwater pump supplies water to the steam generator, the water supply path of the active feedwater tank includes the passive feedwater tank, so that the water in the passive feedwater tank, the water in the active feedwater tank, and the water supply temperature of the steam generator remain unchanged, thereby avoiding temperature shock and improving system stability. On the other hand, when the main feedwater pump is abnormal, the controller controls the passive feedwater tank to supply water to the steam generator. Even when the main feedwater pump is shut down, the steam generator can still be supplied with water normally, thereby avoiding reactor overheating and improving system stability.

[0055] In one embodiment, Figure 2 As shown, the steam generation system further includes: a water injection pipe isolation valve arranged between the passive feedwater tank and the steam generator, and a main feedwater isolation valve arranged between the main feedwater pump and the steam generator.

[0056] The water injection pipe isolation valve may be an isolation valve disposed between the passive water supply tank and the steam generator. The water injection pipe isolation valve is used to control the water flow between the passive water supply tank and the steam generator. Specifically, the water injection pipe isolation valve is used to control the water flow of the auxiliary water supply circuit.

[0057] The main feedwater isolation valve is an isolation valve arranged between the main feedwater pump and the steam generator. The main feedwater isolation valve is used to control the water flow between the main feedwater pump and the steam generator. Specifically, the main feedwater isolation valve is used to control the water flow of the main feedwater circuit.

[0058] When the main water supply pump is normal, the controller obtains the liquid level of the passive water supply tank, and based on the numerical difference between the liquid level and the preset height, controls the valve opening of the water injection pipe isolation valve and the main water supply isolation valve so that the numerical difference is less than the difference threshold.

[0059] Among them, the liquid level height of the passive water supply tank can represent the height of the liquid level in the passive water supply tank.

[0060] The preset height may be a preset value set for the liquid level height.

[0061] Valve travel can indicate the degree of opening of an isolation valve, for example, the angle or stroke through which the valve is open.

[0062] The numerical difference may include the liquid level being greater than a preset height, the liquid level being equal to the preset height, and the liquid level being less than the preset height.

[0063] The difference threshold may be a threshold value configured for the numerical difference. The difference threshold value may be flexibly selected according to actual conditions. For example, the difference threshold may be set to 0.01 times the total height of the passive water tank.

[0064] Specifically, when the main water supply pump is normal, the controller can obtain the liquid level of the passive water supply tank and the preset height set for the liquid level. The controller can increase the opening of the water injection pipe isolation valve and the opening of the main water supply isolation valve based on the numerical difference between the liquid level and the preset height, when the numerical difference indicates that the liquid level is greater than the preset height. When the numerical difference indicates that the liquid level is equal to the preset height, the controller can maintain the opening of the water injection pipe isolation valve. When the numerical difference indicates that the liquid level is less than the preset height, the controller can reduce the opening of the water injection pipe isolation valve and the opening of the main water supply isolation valve.

[0065] In one of the embodiments, a liquid level sensor may be provided in the passive water tank, and the controller may obtain the liquid level of the passive water tank through the liquid level sensor.

[0066] In this embodiment, a water injection pipe isolation valve is provided between the passive feedwater tank and the steam generator, and a main feedwater isolation valve is provided between the main feedwater pump and the steam generator. When the main feedwater pump is normal, the controller obtains the liquid level of the passive feedwater tank, and based on the numerical difference between the liquid level and the preset height, controls the valve opening of each of the water injection pipe isolation valve and the main feedwater isolation valve, so that the numerical difference is less than the difference threshold, and the numerical difference is kept less than the difference threshold, so as to maintain the total amount of water in the passive feedwater tank neither too much nor too little. Not too little can be to ensure the water supply time of the passive feedwater tank to the steam generator when the main feedwater pump may be abnormal in the future. Not too much is to avoid the risk of overpressure of the passive feedwater tank.

[0067] In one embodiment, Figure 3 The schematic diagram of the gas compressor shown in the figure, the steam generation system also includes: a high-pressure gas tank connected to the passive water supply tank, the air pressure in the passive water supply tank and the air pressure in the high-pressure gas tank maintain pressure balance. A gas compressor is arranged on the high-pressure gas tank. When the main water supply pump is normal, the controller obtains the liquid level of the passive water supply tank, and based on the numerical difference between the liquid level and the preset height, controls the gas compressor to work so that the numerical difference is less than the difference threshold.

[0068] Among them, the high-pressure gas tank can be a storage tank filled with high-pressure gas.

[0069] The gas compressor may be a compressor that adjusts the gas pressure in a high-pressure gas tank.

[0070] The air pressure in the passive water tank is kept in pressure balance with the air pressure in the high pressure gas tank. Specifically, the gas in the passive water tank can be kept in balance through a pressure balance pipeline.

[0071] Specifically, when the main feed water pump is normal, the controller can obtain the liquid level of the passive feed water tank, and based on the numerical difference between the liquid level and the preset height, control the gas compressor to operate so that the numerical difference is less than the difference threshold.

[0072] When the main water supply pump is normal, the controller can obtain the liquid level of the passive water supply tank and the preset height set for the liquid level. The controller can increase the output power of the gas compressor based on the numerical difference between the liquid level and the preset height, and when the numerical difference indicates that the liquid level is greater than the preset height, the controller can reduce the liquid level under the action of pressure. When the numerical difference indicates that the liquid level is equal to the preset height, the controller can maintain the output power of the gas compressor. When the numerical difference indicates that the liquid level is less than the preset height, the controller can reduce the output power of the gas compressor, and the liquid level increases under the action of negative pressure.

[0073] Specifically, the controller may obtain the liquid level of the passive water tank and a preset height set for the liquid level.

[0074] When the liquid level is greater than a preset height, the controller can increase the output power of the gas compressor, and the controller can also increase the opening of the water injection pipe isolation valve and the opening of the main water supply isolation valve.

[0075] When the liquid level is equal to the preset height, the controller can maintain the output power of the gas compressor, and the controller can also maintain the opening of the water injection pipe isolation valve and the opening of the main water supply isolation valve.

[0076] When the liquid level is lower than a preset height, the controller can reduce the output power of the gas compressor, and the controller can also reduce the opening of the water injection pipe isolation valve and the opening of the main water supply isolation valve.

[0077] In this embodiment, the high-pressure gas tank connected to the passive water supply tank, the air pressure in the passive water supply tank and the air pressure in the high-pressure gas tank maintain pressure balance. A gas compressor is arranged on the high-pressure gas tank. When the main water supply pump is normal, the controller obtains the liquid level of the passive water supply tank, and based on the numerical difference between the liquid level and the preset height, controls the gas compressor to work so that the numerical difference is less than the difference threshold. Maintaining the total amount of water in the passive water supply tank is neither too much nor too little. Not too little can be to ensure the water supply time of the passive water supply tank to the steam generator when the main water supply pump may be abnormal in the future. Not too much is to avoid the risk of overpressure of the passive water supply tank.

[0078] In one embodiment, the steam generation system further comprises: a liquid level measuring probe disposed in the passive water tank. The liquid level measuring probe is used to detect the liquid level of the passive water tank. The controller also controls the valve opening of the water injection pipe isolation valve when the main feed water pump is abnormal and the liquid level is less than the height threshold, so that the passive feed water tank stops supplying water to the steam generator.

[0079] Among them, the liquid level measurement probe can be a device for measuring the height of liquid, which is widely used in various industrial and environmental engineering. According to different application scenarios and requirements, the liquid level measurement probe has various types and designs.

[0080] The liquid level height is less than the height threshold, which means that the liquid level in the passive water tank is close to the bottom. Since the passive water tank is connected to the high-pressure gas tank, in order to prevent the nitrogen in the high-pressure gas tank from being injected into the steam generator, the valve opening of the water injection pipe isolation valve is controlled to stop the passive water tank from supplying water to the steam generator.

[0081] Specifically, when the main feed water pump is abnormal and the liquid level is less than the height threshold, the controller can close the water injection pipe isolation valve to stop the passive feed water from supplying water to the steam generator.

[0082] In this embodiment, a liquid level measuring probe is provided in the passive water tank. The liquid level measuring probe is used to detect the liquid level of the passive water tank. The controller also controls the valve opening of the water injection pipe isolation valve when the main water supply pump is abnormal and the liquid level is less than the height threshold, so that the passive water supply tank stops supplying water to the steam generator, thereby preventing the nitrogen in the high-pressure gas tank from being injected into the steam generator, causing a shutdown failure.

[0083] In one embodiment, Figure 4The schematic diagram of the check valve shown in FIG. 1 is a schematic diagram of the check valve shown in FIG. 1 , the steam generation system further includes: a water replenishment check valve arranged between the main feed water pump and the passive feed water tank. A main feed water check valve arranged between the main feed water pump and the steam generator. The controller is also used to control the water replenishment check valve and the main feed water check valve to be in an open state when the main feed water pump is normal, and to control the water replenishment check valve and the main feed water check valve to be in a closed state when the main feed water pump is abnormal.

[0084] Among them, the check valve can be a valve used to prevent the backflow of fluid, which is widely used in various pipeline systems. Its main function is to allow the fluid to flow in one direction only and prevent it from flowing in the opposite direction. The working principle of the check valve usually relies on mechanisms such as gravity, head difference or spring pressure to control the opening and closing of the valve.

[0085] The water supply check valve may be a check valve arranged between the main water supply pump and the passive water supply tank.

[0086] The main feedwater check valve may be a check valve arranged between the main feedwater pump and the steam generator.

[0087] Specifically, when the main feedwater pump is normal, the make-up water check valve and the main feedwater check valve are both in an open state, so that the water in the active feedwater tank flows through the main feedwater circuit and the auxiliary feedwater circuit. When the main feedwater pump is abnormal, the make-up water check valve and the main feedwater check valve are both in a closed state, so that the water in the passive feedwater tank supplies water to the steam generator alone.

[0088] In this embodiment, a water replenishment check valve is arranged between the main feed water pump and the passive feed water tank. A main feed water check valve is arranged between the main feed water pump and the steam generator. Both the water replenishment check valve and the main feed water check valve are in an open state, and in the event of an abnormality in the main feed water pump, both the water replenishment check valve and the main feed water check valve are in a closed state, and there is no need to separately arrange an extra control valve. Since the passive feed water tank is installed at a higher position than the steam generator, the check valve can be closed automatically under the influence of the dead weight of the water, so that the water in the passive feed water tank can be supplied to the steam generator alone. The check valve can also be closed automatically, so that the water in the passive feed water tank can be supplied to the steam generator alone.

[0089] In one embodiment, Figure 5 The schematic diagram of the condensing heat exchange circuit shown in FIG. 1 shows a steam generator including a steam header and a feedwater header. The system also includes a condensing heat exchanger connected to the steam header and the feedwater header, respectively. When the main feedwater pump is abnormal, the controller controls the condensing heat exchanger to operate so that the condensing heat exchanger supplies water to the feedwater header, and the condensing heat exchanger receives the generated steam from the steam header.

[0090] The steam header is used to collect and distribute steam so that it can be transported to different equipment or systems for use. The feedwater header is responsible for receiving and distributing water to ensure that the feedwater can evenly enter the steam generator for heating. In a nuclear power plant, the pressure difference between the steam header and the feedwater header needs to be adjusted by the control system to maintain appropriate operating conditions.

[0091] A condensing heat exchanger can be a device used to convert gas or steam into liquid. Its working principle is to transfer heat through an exothermic process to convert steam into condensed water.

[0092] Specifically, when the main feedwater pump is abnormal, the controller can control the condensing heat exchanger to operate so that the condensing heat exchanger supplies water to the feedwater header and the condensing heat exchanger receives the generated steam from the steam header.

[0093] In one embodiment, the steam end of the condensing heat exchanger is connected to the steam header through a steam pipeline, and the condensing water end of the condensing heat exchanger is connected to the feed water header through a condensing water return pipeline.

[0094] In one embodiment, a steam pipe isolation valve may be provided on the steam line. A reflux tank isolation valve may be provided on the condensate return line.

[0095] In this embodiment, the steam generator includes a steam header and a feedwater header. The system also includes condensing heat exchangers connected to the steam header and the feedwater header, respectively. When the main feedwater pump is abnormal, the controller controls the condensing heat exchanger to operate so that the condensing heat exchanger supplies water to the feedwater header, and the condensing heat exchanger receives the generated steam from the steam header. When the main feedwater pump is abnormal, the controller can still control the condensing heat exchanger to operate so that the condensing heat exchanger supplies water to the feedwater header, thereby improving the stability of the system.

[0096] In one embodiment, Figure 5 As shown, the steam generation system further includes: a steam pipe isolation valve disposed between the steam header and the condensing heat exchanger. A return pipe isolation valve disposed between the condensing heat exchanger and the feedwater header. The controller is also used to control the water supply to the condensing heat exchanger by adjusting the valve opening of the steam pipe isolation valve, and to control the steam amount received by the condensing heat exchanger by adjusting the valve opening of the return pipe isolation valve.

[0097] The steam pipe isolation valve may be an isolation valve arranged on the steam pipeline between the steam header and the condensing heat exchanger. The return isolation valve may be an isolation valve arranged on the condensing water return pipeline between the condensing heat exchanger and the feedwater header.

[0098] The water supply volume can refer to the water flow in the condensed water return pipeline output by the condensing heat exchanger. The water supply volume can also refer to the water flow in the water supply header.

[0099] The steam quantity may refer to the steam flow in the received steam line of the condensing heat exchanger. The steam quantity may also refer to the steam flow in the steam header.

[0100] Specifically, the controller can control the water supply to the condensing heat exchanger by adjusting the valve opening of the steam pipe isolation valve, and control the steam amount received by the condensing heat exchanger by adjusting the valve opening of the return pipe isolation valve.

[0101] In one embodiment, the controller obtains the heat exchanger output power of the condensing heat exchanger and determines the valve opening of the steam pipe isolation valve and the valve opening of the return pipe isolation valve according to the heat exchanger output power.

[0102] In this embodiment, a steam pipe isolation valve is provided between the steam header and the condensing heat exchanger. A return pipe isolation valve is provided between the condensing heat exchanger and the water supply header. The controller is also used to control the water supply of the condensing heat exchanger by adjusting the valve opening of the steam pipe isolation valve, and to control the amount of steam received by the condensing heat exchanger by adjusting the valve opening of the return pipe isolation valve, so that the water supply and steam amount can be effectively controlled, ensuring safe production while improving system stability.

[0103] In one embodiment, Figure 6 As shown, the steam generation system further includes: a main steam isolation valve connected to the steam header. The main steam isolation valve and the steam pipe isolation valve are in different steam circuits. When the main feed water pump is normal, the controller controls the valve opening of the main steam isolation valve so that the steam in the steam header is transported to the turbine through the main steam isolation valve to drive the turbine to generate electricity. When the main feed water pump is abnormal, the controller controls the valve opening of the main steam isolation valve so that the steam in the steam header is transported to the condensing heat exchanger through the steam pipe isolation valve.

[0104] The main steam isolation valve may be an isolation valve installed in the main steam circuit. The main steam isolation valve is used to control the steam flow on the main steam pipeline.

[0105] A turbine is a rotary engine that works by extracting energy from a fluid (such as water, steam or air) under pressure. Its basic structure consists of a rotor and a stator. The rotor is equipped with blades, and the fluid acts on the blades to make the rotor rotate and transfer energy.

[0106] Specifically, when the main feedwater pump is normal, the controller can control the valve opening of the main steam isolation valve so that the steam in the steam header is delivered to the turbine through the main steam isolation valve to drive the turbine to generate electricity. When the main feedwater pump is abnormal, the controller can control the valve opening of the main steam isolation valve so that the steam in the steam header is delivered to the condensing heat exchanger through the steam pipe isolation valve.

[0107] In one embodiment, the steam generation system further includes: a safety valve. In order to control the on-off of the main steam pipeline, a main steam isolation valve is connected to the pipeline. In order to prevent the water vapor in the spiral heat exchange tube from overpressure after the main steam isolation valve is closed, a safety valve is connected to the main steam pipeline upstream of the main feedwater isolation valve. When the pressure in the pipeline is higher than a specific value, the valve opens to release steam to the outside to reduce the pressure; when the pressure is lower than a specific value, the safety valve closes. The opening and closing pressures of the safety valve can be set according to the characteristics of the reactor.

[0108] In this embodiment, the main steam isolation valve is connected to the steam manifold. The main steam isolation valve and the steam pipe isolation valve are in different steam circuits. When the main feedwater pump is normal, the controller controls the valve opening of the main steam isolation valve so that the steam in the steam manifold is transported to the turbine through the main steam isolation valve to drive the turbine to generate electricity. When the main feedwater pump is abnormal, the controller controls the valve opening of the main steam isolation valve so that the steam in the steam manifold is transported to the condensing heat exchanger through the steam pipe isolation valve, ensuring that water can be normally supplied to the steam generator in the event of an abnormality in the main feedwater pump, thereby improving system stability.

[0109] In one embodiment, Figure 7 As shown, a steam generation method is provided, which is applied to a controller, and the steam generation method includes:

[0110] S702, when the main feed water pump is normal, control the main feed water pump to operate so that the active feed water tank supplies water to the steam generator; the water supply path of the active feed water tank includes a passive feed water tank.

[0111] The water supply path of the active water supply tank may include a main water supply line and a secondary water supply line.

[0112] The main water supply line may include a main water supply pump, a main water supply pipeline, and a steam generator. The auxiliary water supply line may include a main water supply pump, a water supply line, a passive water supply tank, a water injection line, and a steam generator. Specifically, the auxiliary water supply line may include a main water supply pump, part of the main water supply pipeline, a water supply line, a passive water supply tank, a water injection line, part of the main water supply pipeline, and a steam generator.

[0113] Specifically, when the main feedwater pump is normal, the controller can control the main feedwater pump to supply water to the steam generator along the main feedwater line. The controller can also control the main feedwater pump to supply water to the passive feedwater tank, and the water in the passive feedwater tank flows into the steam generator.

[0114] S704, when the main feed water pump is abnormal, control the passive feed water tank to supply water to the steam generator.

[0115] Among them, the main water supply pump abnormality may mean that the main water supply pump cannot realize the water pumping and delivery function. For example, the main water supply pump abnormality may be any one of the following abnormalities: a circuit failure of the main water supply pump, a power failure of the main water supply pump, and a motor damage in the main water supply pump.

[0116] Specifically, in the event of an abnormality in the main feedwater pump, the controller may control the passive feedwater tank to supply water to the steam generator.

[0117] In one of the embodiments, the controller may control the water injection pipe isolation valve on the water injection pipeline of the passive feedwater tank to open, thereby ensuring that the water in the passive feedwater tank flows to the steam generator.

[0118] In one embodiment, in order to ensure that the water in the passive feedwater tank flows to the steam generator instead of flowing back to the main feedwater pump, a check valve can be provided between the passive feedwater tank and the main feedwater pump. The check valve is in an open state when the main feedwater pump is normal. The check valve is in a closed state when the main feedwater pump is abnormal.

[0119] In the above method, when the main feedwater pump is normal, the main feedwater pump is controlled to work so that the active feedwater tank supplies water to the steam generator. The water supply path of the active feedwater tank includes a passive feedwater tank. When the main feedwater pump supplies water to the steam generator, the water supply path of the active feedwater tank includes the passive feedwater tank, so that the water in the passive feedwater tank, the water in the active feedwater tank, and the water supply temperature of the steam generator remain unchanged, thereby avoiding temperature shock and improving system stability. On the other hand, when the main feedwater pump is abnormal, the passive feedwater tank is controlled to supply water to the steam generator, so that the steam generator can still be supplied with water normally even when the main feedwater pump is shut down, avoiding reactor overheating and improving system stability.

[0120] In one embodiment, a reactor system is provided that includes a steam generating system, and a reactor for heating the steam generator.

[0121] Among them, the steam generator is the key equipment connecting the reactor and the steam turbine. It generates steam by transferring the heat generated by the nuclear reactor to the secondary side water.

[0122] The working principle of the steam generator is to use the coolant in the reactor to drive the core to heat up, and then transfer the heat to the secondary circuit working medium to turn it into steam. In addition, the steam generator is a key device that separates the coolant circuit and the secondary circuit in a pressurized water reactor. It transfers heat from the primary circuit to the secondary circuit through heat transfer pipes, turning the water in the secondary circuit into high-temperature steam. Therefore, the steam generator in the reactor system is not only a heat exchange device, but also an important part of the entire nuclear power generation process.

[0123] In this embodiment, the reactor heats the steam generator so that the heat is exchanged to the steam generated by the steam generator, and the steam then drives the turbine to generate electricity.

[0124] In one embodiment, Figure 8 The advanced reactor system shown includes:

[0125] The active feedwater tank is connected to the steam generator through the main feedwater pump.

[0126] The passive feedwater tank is connected to the steam generator.

[0127] When the main feed water pump is normal, the controller controls the main feed water pump to work so that the active feed water tank supplies water to the steam generator. The water supply path of the active feed water tank includes a passive feed water tank.

[0128] The controller also controls the passive feed water tank to supply water to the steam generator when the main feed water pump is abnormal.

[0129] An injection pipe isolation valve is installed between the passive feedwater tank and the steam generator.

[0130] Main feedwater isolation valve installed between the main feedwater pump and the steam generator.

[0131] When the main water supply pump is normal, the controller obtains the liquid level of the passive water supply tank, and based on the numerical difference between the liquid level and the preset height, controls the valve opening of the water injection pipe isolation valve and the main water supply isolation valve so that the numerical difference is less than the difference threshold.

[0132] For example, in order to control the on and off of the main feedwater pipeline, a main feedwater isolation valve and a main feedwater check valve are connected to the pipeline. The isolation valve can adjust the valve opening and adjust the main feedwater flow; the function of the main feedwater check valve is to prevent the cooling water inside the steam generator from flowing back through the rupture when a rupture occurs in the pipeline upstream of the check valve. Therefore, the check valve should be installed as close to the steam generator inlet as possible to protect the main feedwater pipeline as long as possible.

[0133] A high-pressure gas tank connected to a passive water supply tank, wherein the air pressure in the passive water supply tank maintains a pressure balance with the air pressure in the high-pressure gas tank.

[0134] A gas compressor installed on a high-pressure gas tank.

[0135] Exemplarily, the top of the passive water supply tank is connected to the bottom of the high-pressure gas tank through a pressure balance pipeline. The high-pressure gas tank is filled with high-pressure nitrogen and the installation height can be higher than the passive water supply tank. The passive water supply tank is filled with cooling water.

[0136] When the main feed water pump is operating normally, the controller obtains the liquid level of the passive feed water tank, and based on the numerical difference between the liquid level and a preset height, controls the gas compressor to operate so that the numerical difference is less than a difference threshold.

[0137] The liquid level measuring probe is installed in the passive water tank. The liquid level measuring probe is used to detect the liquid level height of the passive water tank.

[0138] The controller also controls the valve opening of the water injection pipe isolation valve when the main feed water pump is abnormal and the liquid level is less than the height threshold, so that the passive feed water tank stops supplying water to the steam generator.

[0139] Exemplarily, the water injection pipeline is connected between the bottom of the passive water supply tank and the main water supply pipeline, and the connection position with the main water supply pipeline is located downstream of the main water supply isolation valve and the main water supply check valve. The diameter of the water injection pipeline is the same as or slightly smaller than the diameter of the main water supply pipeline. In order to control the on-off and flow rate of the water injection pipeline, a water injection pipe isolation valve is connected to the pipeline. The opening of the isolation valve is adjustable. A liquid level measuring probe is installed at the bottom of the passive water supply tank. When the liquid level inside the water tank is lower than a specific limit, the water injection pipe isolation valve is automatically triggered to close.

[0140] A water supply check valve is installed between the main water supply pump and the passive water supply tank.

[0141] The main feed water check valve is installed between the main feed water pump and the steam generator.

[0142] Exemplarily, the cold source water in the passive water supply tank comes from the main water supply pump, and its bottom is connected to the main water supply pipeline through a make-up water pipeline, and the connection position is located upstream of the main water supply isolation valve and the main water supply check valve. A make-up water check valve is connected to the make-up water pipeline, which limits the water source to only flow to the make-up water pipe through the main water supply pipe, and cannot flow back, so as to prevent the water source in the passive water supply tank from flowing back through the make-up water pipeline and flowing out through the break in the main water supply pipeline. Therefore, the make-up water check valve should be installed as close to the bottom of the passive water supply tank as possible, or directly welded to the connecting nozzle of the passive water supply tank. The diameter of the passive water supply pipeline is much smaller than the diameter of the main water supply pipeline to limit the flow through the make-up water pipeline. The function of the make-up water pipeline is to supplement the main water supply drainage in the main water supply pipeline to the passive water supply tank.

[0143] The system also includes a condensing heat exchanger connected to the steam header and the feedwater header respectively.

[0144] When the main feed water pump is abnormal, the controller controls the condensing heat exchanger to operate so that the condensing heat exchanger supplies water to the feed water header and the condensing heat exchanger receives the generated steam from the steam header.

[0145] A steam pipe isolation valve is installed between the steam header and the condensing heat exchanger.

[0146] A return pipe isolation valve is installed between the condensing heat exchanger and the feed water manifold.

[0147] The controller is also used to control the amount of water supplied to the condensing heat exchanger by adjusting the valve opening of the steam pipe isolation valve, and to control the amount of steam received by the condensing heat exchanger by adjusting the valve opening of the return pipe isolation valve.

[0148] Under normal operation, the main pump is running, and condensed water is drawn from the active water supply tank and pressurized and then injected into the main water supply pipeline. The main water supply isolation valve and the water injection pipe isolation valve are in the open state. The water injection pipe isolation valve is opened as wide as possible, and the opening of the main water supply isolation valve is adjusted as needed. Due to the flow resistance of the main water supply check valve and the main water supply isolation valve, driven by the pressure difference, part of the main water supply enters the passive water supply tank through the water supply pipeline. By adjusting the pressure in the high-pressure nitrogen tank and the opening of the main water supply isolation valve through the gas compressor and the gas release valve, the water level in the passive water supply tank is stabilized near the design value, and the pressure of the high-pressure gas tank is also close to the pressure at the outlet of the main water supply pump. After the water level is stable, the main water supply entering from the water supply pipeline is mixed with the water in the passive water supply tank, and then flows back to the water supply pipeline through the water injection pipeline. At this time, the flow rate from the make-up water pipeline into the passive make-up water tank is small, and its main function is to maintain the water source temperature in the passive make-up water tank stable near the normal main water supply temperature.

[0149] When the whole plant loses AC power, the main pump stops operating, the high-flow main water supply driven by the main pump stops, and the main water supply is lost. At this time, the water supply pressure upstream of the main water supply check valve and the water supply check valve quickly drops to a pressure lower than the pressure downstream of the check valve, triggering the check valve to close. At the same time, after the check valve is closed, the pressure at the outlet of the steam generator also decreases due to the reduction in water supply flow. Since the initial pressure of the high-pressure nitrogen tank on the top of the passive water supply tank is maintained close to the pressure of the main water supply pump, the pressure in the tank is higher than the pressure at the inlet of the steam generator. The water source in the passive water supply tank is driven by the pressure of the high-pressure gas tank and is continuously injected into the main water supply pipeline through the water injection pipeline to ensure that the main water supply at the inlet of the steam generator is not interrupted and the water supply flow is continuously obtained for a long time. By adjusting the water volume of the passive water supply tank and the volume of the high-pressure gas tank, the maintenance time and flow rate of the passive water supply can be adjusted. A liquid level measuring probe is installed at the bottom of the passive water feed tank. When the liquid level inside the water tank is lower than a specific limit, the water injection pipe isolation valve is automatically triggered to close, preventing the nitrogen in the high-pressure gas tank from being injected into the steam generator.

[0150] Under normal operating conditions, the advanced reactor transfers the heat generated by the reactor core to the secondary side of the steam generator through the steam generator and converts it into steam energy. At this time, the main feedwater isolation valve, main steam isolation valve, and water injection pipe isolation valve are in the open state, the steam pipe isolation valve and condensate return pipe isolation valve are in the closed state, the main feedwater pump is running, and the condensate in the active feedwater tank is continuously injected into the steam generator, continuously extracting and absorbing the energy of the primary side of the steam generator, and the generated steam is discharged from the main steam pipeline.

[0151] When an accident occurs in the reactor, such as a power outage in the entire plant, the main feedwater pump will stop operating and the active feedwater will be lost instantly. After the active feedwater is lost, the main feedwater check valve and the make-up water check valve will automatically close under the pressure difference drive, and the cooling water in the passive make-up water tank will be injected into the steam generator under the pressure drive of the high-pressure gas tank to ensure that the steam generator feedwater is not interrupted and the reactor heat is continuously extracted. When the low pressure signal at the steam generator outlet is reached, the main steam isolation valve will be triggered to close. After the main steam isolation valve is closed, the continuous generation of steam in the spiral tube will cause the steam generator outlet pressure to rise. When the high pressure signal is reached, the steam pipe isolation valve and the condensate return isolation valve will be triggered to open, so that the passive residual heat removal system is put into use and the reactor heat is continuously extracted. Before the passive residual heat removal system is started, the rapid increase in pressure will cause the OTSG outlet safety valve to open, and high-temperature steam will be discharged from the safety valve to the external environment, forming a heat removal path of: passive feedwater tank-spiral pipe-safety valve-external environment. When the reactor temperature drops or the water source of the passive feedwater tank is exhausted, the steam generator pressure drops, the safety valve is isolated, and the passive feedwater system has been started, forming a heat removal path of: passive feedwater tank (or condensate reflux pipeline)-spiral pipe-steam pipeline-condensing heat exchanger-heat trap water tank-external environment.

[0152] It can be seen that the water supply system combining active and passive methods can continuously supply water to the steam generator after an accident occurs, continuously extracting the heat from the reactor, effectively ensuring the continuous extraction of heat from the reactor core, avoiding the deterioration of ground heat transfer, and improving the safety and reliability of the reactor.

[0153] In this embodiment, the active feedwater tank is connected to the steam generator through the main feedwater pump, and the passive feedwater tank is connected to the steam generator; using the above system, on the one hand, when the main feedwater pump is normal, the controller controls the main feedwater pump to work so that the active feedwater tank supplies water to the steam generator; the water supply path of the active feedwater tank includes the passive feedwater tank, and when the main feedwater pump supplies water to the steam generator, the water supply path of the active feedwater tank includes the passive feedwater tank, so that the water in the passive feedwater tank, the water in the active feedwater tank, and the water supply temperature of the steam generator remain unchanged, thereby avoiding temperature shock and improving system stability. On the other hand, the controller also controls the passive feedwater tank to supply water to the steam generator when the main feedwater pump is abnormal, so that the steam generator can still be supplied with water normally even when the main feedwater pump is shut down, avoiding reactor overheating, thereby improving system stability.

[0154] The above method can also bring the following beneficial effects:

[0155] 1) Passive system, no active energy input required;

[0156] 2) In the event of an active water supply failure and before the secondary side residual heat removal system is started, the system can achieve uninterrupted steam generator water supply and energy removal, ensuring continuous extraction of reactor core energy, avoiding deterioration of core heat transfer, and ensuring reactor safety;

[0157] 3) It can replace the water replenishment tank of the secondary side waste heat removal system and assume the water replenishment function of the secondary side waste heat removal system;

[0158] 4) Reduce the possible rise in reactor core temperature during an accident and increase the safety margin;

[0159] 5) Greatly increase the safety and reliability of the reactor.

[0160] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0161] Based on the same inventive concept, the embodiment of the present application also provides a steam generating device for implementing the steam generating method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more steam generating device embodiments provided below can refer to the above limitations on the steam generating method, and will not be repeated here.

[0162] In one embodiment, a steam generating device is provided, comprising: a normal water supply module, for controlling the operation of a main feed water pump when the main feed water pump is normal, so that an active feed water tank supplies water to a steam generator; a water supply path of the active feed water tank, including a passive feed water tank; and an abnormal water supply module, for controlling the passive feed water tank to supply water to the steam generator when the main feed water pump is abnormal.

[0163] Each module in the steam generating device can be implemented in whole or in part by software, hardware or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0164] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Fig. 9 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store water supply path data. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a steam generation method is implemented.

[0165] Those skilled in the art will understand that Fig. 9 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0166] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the above method steps are implemented when the processor executes the computer program.

[0167] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the above method steps are implemented.

[0168] In one embodiment, a computer program product is provided, comprising a computer program, which implements the above method steps when executed by a processor.

[0169] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0170] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0171] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A steam generating system, characterized in that: The system comprises an active feedwater tank, a main feedwater pump, a passive feedwater tank, a steam generator and a controller; The active feedwater tank is connected to the steam generator via the main feedwater pump; The passive water feed tank is connected to the steam generator; When the main feed water pump is normal, the controller controls the main feed water pump to work so that the active feed water tank supplies water to the steam generator; the water supply path of the active feed water tank includes the passive feed water tank; The controller also controls the passive feed water tank to supply water to the steam generator when the main feed water pump is abnormal.

2. The system according to claim 1, characterized in that The system further comprises: a water injection pipe isolation valve disposed between the passive feedwater tank and the steam generator; a main feedwater isolation valve disposed between the main feedwater pump and the steam generator; When the main water supply pump is normal, the controller obtains the liquid level of the passive water supply tank, and based on the numerical difference between the liquid level and a preset height, controls the valve openings of the water injection pipe isolation valve and the main water supply isolation valve so that the numerical difference is less than a difference threshold.

3. The system according to claim 1, characterized in that The system further comprises: A high-pressure gas tank connected to the passive water supply tank, wherein the air pressure in the passive water supply tank is balanced with the air pressure in the high-pressure gas tank; A gas compressor disposed on the high-pressure gas tank; When the main water supply pump is normal, the controller obtains the liquid level of the passive water supply tank, and based on the numerical difference between the liquid level and a preset height, controls the gas compressor to operate so that the numerical difference is less than a difference threshold.

4. The method according to claim 3, characterized in that The system further comprises: A liquid level measuring probe is arranged in the passive water tank; the liquid level measuring probe is used to detect the liquid level height of the passive water tank; The controller also controls the valve opening of the water injection pipe isolation valve when the main water supply pump is abnormal and the liquid level is less than a height threshold, so that the passive water supply tank stops supplying water to the steam generator.

5. The system according to claim 1, characterized in that The system further comprises: A water supply check valve disposed between the main water supply pump and the passive water supply tank; A main feed water check valve is arranged between the main feed water pump and the steam generator.

6. The system according to claim 1, characterized in that The steam generator comprises a steam header and a feedwater header; The system further comprises a condensing heat exchanger connected to the steam header and the feedwater header respectively; When the main feedwater pump is abnormal, the controller controls the condensing heat exchanger to operate so that the condensing heat exchanger supplies water to the feedwater header and the condensing heat exchanger receives the generated steam from the steam header.

7. The system according to claim 6, characterized in that The system further comprises: a steam pipe isolation valve disposed between the steam header and the condensing heat exchanger; A return pipe isolation valve disposed between the condensing heat exchanger and the water supply header; The controller is also used to control the inlet steam volume of the condensing heat exchanger by adjusting the valve opening of the steam pipe isolation valve, and to control the outlet water supply volume of the condensing heat exchanger by adjusting the valve opening of the return pipe isolation valve.

8. The system according to claim 7, characterized in that The system further comprises: A main steam isolation valve connected to the steam header; the main steam isolation valve and the steam pipe isolation valve are in different steam circuits; When the main feedwater pump is normal, the controller controls the valve opening of the main steam isolation valve so that the steam in the steam header is transported to the turbine through the main steam isolation valve to drive the turbine to generate electricity; When the main feedwater pump is abnormal, the controller controls the valve opening of the main steam isolation valve so that the steam in the steam header is transported to the condensing heat exchanger through the steam pipe isolation valve.

9. A steam generation method, characterized in that: Applied to the controller according to any one of claims 1 to 8, the method comprises: When the main feed water pump is normal, the main feed water pump is controlled to work so that the active feed water tank supplies water to the steam generator; the water supply path of the active feed water tank includes the passive feed water tank; When the main feedwater pump is abnormal, the passive feedwater tank is controlled to supply water to the steam generator.

10. A reactor system, characterized in that: It comprises the steam generating system as claimed in claims 1 to 8, and a reactor for heating the steam generator.

Images